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143 lines
3.5 KiB
143 lines
3.5 KiB
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Digital Voice Modem - Test Suite
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* GPLv2 Open Source. Use is subject to license terms.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* Copyright (C) 2025 Bryan Biedenkapp, N2PLL
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*
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*/
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#include "common/Log.h"
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#include "common/Utils.h"
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#include <catch2/catch_test_macros.hpp>
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#include <cstring>
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#include "common/edac/RS634717.h"
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using namespace edac;
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TEST_CASE("RS241213 preserves all-zero payload", "[edac][rs241213]") {
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uint8_t data[24U];
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::memset(data, 0x00U, sizeof(data));
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RS634717 rs;
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rs.encode241213(data);
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REQUIRE(rs.decode241213(data));
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for (size_t i = 0; i < 9U; i++) {
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REQUIRE(data[i] == 0x00U);
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}
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}
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TEST_CASE("RS241213 preserves all-ones payload", "[edac][rs241213]") {
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uint8_t data[24U];
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::memset(data, 0xFFU, sizeof(data));
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RS634717 rs;
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rs.encode241213(data);
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Utils::dump(2U, "encode241213()", data, 24U);
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REQUIRE(rs.decode241213(data));
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for (size_t i = 0; i < 9U; i++) {
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REQUIRE(data[i] == 0xFFU);
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}
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}
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TEST_CASE("RS241213 preserves alternating pattern", "[edac][rs241213]") {
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uint8_t original[12U];
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for (size_t i = 0; i < 12U; i++) {
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original[i] = (i % 2 == 0) ? 0xAAU : 0x55U;
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}
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uint8_t data[24U];
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::memcpy(data, original, 12U);
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::memset(data + 12U, 0x00U, 12U);
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RS634717 rs;
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rs.encode241213(data);
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Utils::dump(2U, "encode241213()", data, 24U);
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REQUIRE(rs.decode241213(data));
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// Verify data portion matches original
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REQUIRE(::memcmp(data, original, 9U) == 0);
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}
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TEST_CASE("RS241213 preserves incrementing pattern", "[edac][rs241213]") {
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uint8_t original[12U];
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for (size_t i = 0; i < 12U; i++) {
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original[i] = (uint8_t)(i * 21); // Spread across byte range
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}
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uint8_t data[24U];
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::memcpy(data, original, 12U);
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::memset(data + 12U, 0x00U, 12U);
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RS634717 rs;
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rs.encode241213(data);
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Utils::dump(2U, "encode241213()", data, 24U);
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REQUIRE(rs.decode241213(data));
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REQUIRE(::memcmp(data, original, 9U) == 0);
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}
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TEST_CASE("RS241213 corrects single-byte errors", "[edac][rs241213]") {
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uint8_t original[12U];
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for (size_t i = 0; i < 12U; i++) {
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original[i] = (uint8_t)(i + 100);
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}
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uint8_t data[24U];
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::memcpy(data, original, 12U);
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::memset(data + 12U, 0x00U, 12U);
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RS634717 rs;
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rs.encode241213(data);
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Utils::dump(2U, "encode241213()", data, 24U);
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// Introduce single-byte errors at various positions
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const size_t errorPositions[] = {0, 5, 11, 15, 20};
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for (auto pos : errorPositions) {
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uint8_t corrupted[24U];
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::memcpy(corrupted, data, 24U);
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corrupted[pos] ^= 0xFFU; // Flip all bits in one byte
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RS634717 rsDec;
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bool decoded = rsDec.decode241213(corrupted);
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// RS(24,12,13) can correct up to 6 symbol errors
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if (decoded) {
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REQUIRE(::memcmp(corrupted, original, 9U) == 0);
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}
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}
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}
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TEST_CASE("RS241213 detects uncorrectable errors", "[edac][rs241213]") {
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uint8_t original[12U];
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for (size_t i = 0; i < 12U; i++) {
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original[i] = (uint8_t)(i * 17);
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}
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uint8_t data[24U];
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::memcpy(data, original, 12U);
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::memset(data + 12U, 0x00U, 12U);
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RS634717 rs;
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rs.encode241213(data);
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Utils::dump(2U, "encode241213()", data, 9U);
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// Introduce too many errors (beyond correction capability)
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for (size_t i = 0; i < 10U; i++) {
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data[i] ^= 0xFFU;
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}
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// Should fail to decode
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bool result = rs.decode241213(data);
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REQUIRE(!result);
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}
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